It’s not easy for trailwalkers to finish walking a__ trail within 48 hours.
Although all of the apples _____, none of them _____ good。
Some people waste a lot of food___________ others don’t have enough to eat.
―Who is making so much noise in the garden? ―___________ the children.
In the middle of the room stands a__________ table.
Enough sleep is good for health. If you______ for your favorite TV programs, you will feel sleepy.